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- W2029174912 endingPage "481" @default.
- W2029174912 startingPage "459" @default.
- W2029174912 abstract "An NMR titration method has been used to simultaneously measure the acid dissociation constant (pKa) and the intramolecular NHO prototropic constant ΔKNHO on a set of Schiff bases. The model compounds were synthesized from benzylamine and substituted ortho-hydroxyaldehydes, appropriately substituted with electron-donating and electron-withdrawing groups to modulate the acidity of the intramolecular NHO hydrogen bond. The structure in solution was established by 1H-, 13C- and 15N-NMR spectroscopy. The physicochemical parameters of the intramolecular NHO hydrogen bond (pKa, ΔKNHO and ΔΔG°) were obtained from 1H-NMR titration data and pH measurements. The Henderson–Hasselbalch data analysis indicated that the systems are weakly acidic, and the predominant NHO equilibrium was established using Polster–Lachmann δ-diagram analysis and Perrin model data linearization." @default.
- W2029174912 created "2016-06-24" @default.
- W2029174912 creator A5000470791 @default.
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- W2029174912 date "2013-12-31" @default.
- W2029174912 modified "2023-10-18" @default.
- W2029174912 title "NMR Structural Study of the Prototropic Equilibrium in Solution of Schiff Bases as Model Compounds" @default.
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- W2029174912 doi "https://doi.org/10.3390/molecules19010459" @default.
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